O-Glycoprotease is a specific endoprotease for O-glycoproteins, capable of catalyzing the hydrolysis of peptide bonds directly adjacent to O-glycan structures in natural mucin-type O-glycosylated proteins. The sequence of O-Glycoprotease is derived from Akkermansia muciniphila, and it is recombinantly expressed in E. coli with a C-terminal 6×His tag. This enzyme maintains high activity within a pH range of 5.5 to 7.5, is resistant to 1 M NaCl, but is highly sensitive to EDTA (0.5 mM EDTA) and can be inhibited by Zn2+.